[GitHub] geode-examples issue #4: Updating and simplifying examples

[metatype]

Github user metatype commented on the issue:

    https://github.com/apache/geode-examples/pull/4
  
    Here's a possible unit test.  It mocks the Geode API (lol), invokes the 
Example, and checks `System.out` .
    
    ```java
    package org.apache.geode.examples.replicated;
    
    import static org.assertj.core.api.Assertions.assertThat;
    import static org.mockito.Matchers.any;
    import static org.mockito.Matchers.anyInt;
    import static org.mockito.Matchers.isA;
    import static org.mockito.Mockito.mock;
    import static org.mockito.Mockito.when;
    import static org.powermock.api.mockito.PowerMockito.whenNew;
    
    import java.util.Collections;
    
    import org.apache.geode.cache.Region;
    import org.apache.geode.cache.client.ClientCache;
    import org.apache.geode.cache.client.ClientCacheFactory;
    import org.apache.geode.cache.client.ClientRegionFactory;
    import org.apache.geode.cache.client.ClientRegionShortcut;
    import org.junit.Rule;
    import org.junit.Test;
    import org.junit.contrib.java.lang.system.SystemOutRule;
    import org.junit.runner.RunWith;
    import org.powermock.core.classloader.annotations.PrepareForTest;
    import org.powermock.modules.junit4.PowerMockRunner;
    
    @RunWith(PowerMockRunner.class)
    @PrepareForTest({ Example.class })
    public class ExampleTest {
    
      @Rule
      public SystemOutRule systemOutRule = new SystemOutRule().enableLog();
    
      @Test
      @SuppressWarnings("unchecked")
      public void testExample() throws Exception {
        ClientCacheFactory cacheFactory = mock(ClientCacheFactory.class);
        whenNew(ClientCacheFactory.class).withNoArguments()
            .thenReturn(cacheFactory);
        when(cacheFactory.addPoolLocator(any(), 
anyInt())).thenReturn(cacheFactory);
        when(cacheFactory.set(any(), any())).thenReturn(cacheFactory);
    
        ClientCache cache = mock(ClientCache.class);
        when(cacheFactory.create()).thenReturn(cache);
    
        ClientRegionFactory<Integer, String> regionFactory = mock(
            ClientRegionFactory.class);
        when(cache.<Integer, String> createClientRegionFactory(
            isA(ClientRegionShortcut.class))).thenReturn(regionFactory);
    
        Region<Integer, String> region = mock(Region.class);
        when(regionFactory.create(any())).thenReturn(region);
    
        when(region.getName()).thenReturn("example-region");
        when(region.put(any(), any())).thenReturn(null);
        when(region.get(any())).thenReturn("value");
        when(region.keySetOnServer()).thenReturn(Collections.EMPTY_SET);
    
        Example.main(null);
        assertThat(systemOutRule.getLog())
            .contains("Inserted 10 entries into region");
      }
    }
    ```
    
    Thoughts?


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